Meet the car Rolls-Royce describes as its sexiest car yet.

Rolls-Royce reveals Dawn convertible

Named Dawn, it is in effect a convertible based on the brand's Wraith coupe, one that should be a little more accessible than the million-dollar Phantom Drophead flagship, but still out of reach to all but the world's wealthiest motorists.

"Dawn is a beautiful new motor car that offers the most uncompromised open-top motoring experience in the world," he says.

"It will be the most social of super-luxury drophead motor cars for those who wish to bathe in the sunlight of the world's most exclusive and social hotspots."

The Dawn features a folding fabric roof. Photo: simon clay

Designed to seat four in comfort with the top folded or in place, the car features 80 per cent new bodywork as compared with the Wraith, lending the new model its own look.

Prices for the new model have not been announced, though the Wraith's $645,000 sticker points to a starting point of at least $700,000 for the more exclusive convertible.

The British marque claims that its new model is the quietest convertible ever made, and that it matches hard-top cousins for serenity when the fabric roof is overhead.

The new model is designed to seat four adults in comfort. Photo: Supplied

Superb craftsmanship includes open-pore Candel wood decking that envelops the cabin at the rear, cascading down between the rear seats in a "waterfall" motif that echoes similar treatment on the dashboard.

Inspired by the designs of hand-finished wooden powerboats from the likes of Riva, the machine features four separate bucket seats trimmed in sumptuous two-tone leather available in just about any colour owners can conjure.

Fitted with 20-inch wheels as standard or 21-inch hoops as an option, the machine has specifically-tailored tyres built to be as quiet as possible, matching a roof that can fold silently in 22 seconds.

A touchpad linked to the 10.25-inch infotainment screen goes beyond the regular English vocabulary to recognise Arabic and Mandarin script, a feature that will no doubt be welcomed by customers in emerging markets.

Sharing its mechanical hardware with the Wraith, the five-metre-long, 2.5 tonne convertible can waft to 100km/h in 4.9 seconds, on to a top speed limited to 250km/h.

It has the same 6.6-litre V12 as the Wraith and Ghost, tuned to produce 420kW and 780Nm of effortless power, along with an eight-speed automatic transmission that uses satellite data to help it choose the right gear.